I am a flight nurse and nurse practitioner so I don't have any extra minutes to spend pumping. After not being able to reach my breastfeeding goals with my first son I was determined to find a way to reach 12 months if possible. When I returned to work I struggled at first to use a traditional pump, due to the constant changes in schedule I was not able to pump as frequently as I wanted and I saw it reflected in my supply. At that time one of my coworkers had purchased the willow and I knew it would be amazing! I did have difficulty getting the same output and through coaching calls I was able to match output and optimize the pump. I do wish the flanges came in more sizes, that the bags were reusable and that the clear flanges were available for the 1.0. I love the willow, its worth the money. Its not a perfect device however is amazing and something that has revolutionized breast feeding. Every woman should have access to a pump like this! Hopefully in the future when they upgrade a pump they will either offer the new upgrades to old pumps or offer a large discount for a current willow user to upgrade.